I _____ to help you but I was not able to spare any time. I _____a paper last night and I’ll have to finish it today.
Our manager has gone to Paris, so I have to deal with all the letters during his ________.
To qualify yourself for this kind of new job, I recommend that you ________ some online courses.
I soon found that the work I was doing had already been done by someone else —________ I was wasting time.
The doctor has worked with patients of this kind for eight years, so he knows what ________ in his job.
—Who telephoned you just now? — don’t know. I was about to answer the phone when it ________.